Investment Calculator
Project future investment value from starting balance, contributions, return, and time.
Investment Calculator Inputs
Results computed instantly — your data never leaves your device.
Live Investment Calculator Results
Real-TimeProjected Future Value
$300,850.72
240 compounding periods
Growth
$30,387.39
Contributions
$260,463.33
Starting Principal
$10,000
How to Use the Investment Calculator
- 1
Enter current balance.
- 2
Enter monthly contribution, return, and years.
- 3
Review future value, growth, and contributions.
- 4
Compare assumptions.
Formula & Mathematical Basis
Variable Key
PCurrent balance
CMonthly contribution
rAnnual return
nMonthly frequency
tYears
📝 Monthly compounding with a safe zero-rate branch.
Step-by-Step Examples
Growth projection
Scenario: Balance and monthly deposits over time.
- 1.Project balance.
- 2.Project deposits.
- 3.Add values.
- 4.Review future value.
Practical Use Cases
- ✓ Compare contribution plans.
- ✓ Explore horizons.
- ✓ Test returns.
- ✓ Support planning.
- ✓ Separate growth from deposits.
Common Pitfalls
- ⚠ Treating projections as guarantees.
- ⚠ Ignoring fees and taxes.
- ⚠ Mixing units.
- ⚠ Omitting deposits.
- ⚠ Confusing nominal and real return.
Frequently Asked Questions
What is projected?
A future value from balance, contribution, return, and time.
Are returns guaranteed?
No.
Are fees included?
No.
Is it client-side?
Yes.
Savings & Investing Calculators
Project compound growth, retirement balances, inflation effects, and annualized investment performance with stated assumptions.